that will only happen if Tesla starts taking a global view (as companies like BMW do).... from what I've seen recently, Tesla are one of the most US centric car companies on the planet.
On the Active E, I don't see how BMW is any less US-centric at this stage. The Active E comes with a J1772 plug only, while the base MSRP is higher than the base MSRP for the Model S (and you get a smaller, slower car with less range). I don't see anywhere near the same amount of outrage/hand wringing over that decision as over Tesla's decision for a proprietary plug and no supercharging on the base model.
The US focus by Tesla may have to do with logistical reasons (esp. for Model S, which will be almost entirely made/assembled in the USA, while for the Roadster they had gliders made in the UK). Other large companies already have or plan to build factories all over the world.
It just makes more sense to focus on the US first, especially given the US government is currently the leader in plug-in subsidies (heck, the Model S wouldn't exist without US government support). Even the Leaf, the Volt, the Focus EV, Fit EV, Active E, RAV4 EV, etc. isn't an exception (even though Nissan and GM do plan to build factories in the UK). And currently it's obvious in terms of a market for electric passenger cars, the US is the leader (Japan being second). The iMIEV (and its various clones) depended heavily on fleet sales to get a significant amount of orders in Europe and was still easily eclipsed by the Leaf, which was almost entirely based on Japanese and US sales to consumers (not fleets). That shows US sales are absolutely critical to EV success, while sales elsewhere (except for Japan, for the Japanese based companies) are not.
That said, I wanted to once again point out, there are still quite a bit of questions marks left in terms of the Model S launch in the US, much less the European one, so I'm wary of drawing too many conclusions before the Model S is in consumer hands.